Motor driven beater



July 21, 1936. A IF, DQRMEYER 1 l 2,048,184

` MOTOR DRIVEN BEATER Filed Feb. 17, 1930 3 Sheets-Sheet l 20 @La f ,20 11 t 19 f 19 r 1 13 v 16 j@ 20 L L5' |V i 15 :zum l t h I! Adm j 16 ll H1 il 1 10' I 33 *I a I v 4 62 90 l' 5 61 *t* 6.9 57 i! 12 w91 :l w i..

fill/6111501 ,Maw/M afg@ July 21, 1936.

A. F. DoRMl-:YER

MOTOR DRIVEN BEATER Filed Feb. 1;?, 195o 3 Sheets-Sheet 2 y...HIIIII July 21, 1936 lA. F. DoRMEYl-:R 2,048,184

MOTOR DRIVEN BEATER Filed Feb. 17, 1930 3 Sheets-Sheet 3 Ju/enf dlerjormgyer h W Y WIS.

Patented July 21, 1936 `UNITI-:D STATES PATENT] OFFICE mesne assignments, to Hamilton Beach `Manui'acturing Co., Racine, Wis., a corporation o! Wisconsin Application February 17, 1930, Serial No. 428,897

Y3 Claims.

Ihe present invention relates to motor driven beaters, adapted for beating eggs, whipping cream, mixing batters, and for other purposes.

One of the objects of the invention is the provision of` a portable unitary structure, which is light, compact and Well-balanced, lso that it' is capable of being easily handled and used for its vintended purpose.

Another object is the provision of an improved driving mechanism or gearing for beaters of the type having a pair of beater elements. y

Another object is the provision of a motor drivenbeater mechanism which is' readily applicable to ordinary electric motors, thereby enabling a manufacturer to construct finished `motor driven beaters by the addition oi the drive mechanism, beaters and other parts to a standard electric motor.

Another object is the provision of an improved motor driven beater havinga very simple yet effective and eilicient driving mechanism for the beater rods, including a worm and worm gear operatively connected with a pair of beater shafts or rods, and with-the shaft of the motor to drive the beaters in opposite directions.

Another object is the provision of an improved beater mechanism, which may be enclosed in a compact gear casing for attachment to any of a plurality of standard motors on the market.

Another object is the provision beater mechanism, having means for facilitating the cleansing of the device without danger of wetting the motor or gears. This is accomplished by providing beater elements which are removably mounted on the lower ends of the beater shafts or rods, so that the beater elements are removable from the gearing or other mechanism.

Another object is the provision of an improved form of removable support for journaling the lower ends of the beaters and holding the upper ends of the beaters in operative engagement with the lower ends of the beater shafts.

Other objects and advantages of theinvention will be apparent from thefollowing description and the accompanyingidrawings in which similar characters of reference indicate similar parts throughout the several views.

Referring to the drawings:

Fig. 1 is a side elevational view of the motor driven beater;

Fig. 2 is a front elevational view;

Fig. 3 is an exploded detail view of a part of the beater support and one beater element;

. Fig. 4 isa sectional view taken on the plane of the line 4-4 in Fig. 2;

Fig. 5 is an elevational view of the motor unit with the casing broken away to show the driving mechanism;

Fig. 6 is a sectional view taken on the plane of the line 676 of Fig. 5;

Fig. 7 is an elevational view of anequivalent or modified form of motor driven beater with a slightly different drive mechanism; v Fig. 8 is a detail sectional view through the gear casing showing the drive mechanismfor the modified type of Fig. 7.

Referring to Figs. 1 and 2, the motor driven beater, which is the subject of the present invention, preferably includes a standard electric motor Ill, which is provided with a handle I I, and with any appropriate form of, electric supply cord I2 for connection to wall sockets or other source of supply. The motor I0 .is preferably a series motor ,of the universal type, capable of operation on either direct current or alternating current, and it may be provided with adjustable commutator brushes capable of being adjusted by means of the handles I3 to vary the speed of the motor.

In the present embodiment, the handle Ily com'- prises a pair of sheet metal straps I4 and I 5, each of which is formed with an attaching ange I6, l1 of appropriate shape to engage the adjacent surface of the motor I Il, and the attaching flanges I6 and I1 are preferably secured to the motor 30 -by screw bolts I8. Y

handle I I, which may be securedto the strapl by a wood screw 20.

The other strap I5 is bent outward from the motor casing I0 to provide space for the handle II, and its end is likewise secured to the handle II by a wood screw 20 or any other fastening means in such a manner that the handle II is inclined at the angle which is most convenient for manipulation by the user of the mixer. The motor I0 is, of course, provided with an armature 2i iixedly supported on an armature shaft or motor shaft 22, and the shaft v22 is rotatably mounted in bearings 23 carried by the opposite ends of the motor casing III.

In order to enclose and protect the driving mechanism for a pair of beaters 24, 25, the device is provided with va gear casing 3l, and the shaft 22 preferably projects from the end of the motor casing to provide an operative mechanical connection between the motor armature and the i driving Imechanism for the beaters 24 and 25.

, one end with a cover plate 25, which is secured to the casing i with a plurality of screw bolts 21, and the cover plate is provided with a centrally located aperture 28 for iixedly receiving the bearing 23.

The motor shaft 22 xedly supports a worm 29, which is adapted to provide an operative mechanical connection with a pair of worm gears 30, 3| for driving the beaters 24 and 25 at a reduced rate of speed in opposite directions. In the embodiment illustrated in Fig. 5, the shaft 22 is incidentally of suiiicient length' to project from an opening 32 in the gear casing 33, and under such conditions the shaft 22 also performs the func-` tion of aiding in the location and support of gear casing 33, but since theshaft 22 is journaled in the motor i3, it will be obvious that it need extend no further than is suflicient to support the worm 29.

In order to rotatably support the worm gears 30 and 3|, for operative engagement with the opposite sides of the worm 29, the plate 26 which 25- orms an inner wall of a gear casing 33 preferably supports a bearing bracket 34 having a pair of downwardly extending bearing flanges 35 and 35, each of which is provided with an apertureJ 31. The worm gears 30 and 3| may then be rotatably supported on the bearing flanges 35, 36 by the.

screw bolts 38, which pass through flanges 35, 36 and through the worm gears to rotatably support said gears.

Since the worm gear 35 engages one side of worm 32 while worm gear 3i engages the oppo` site side, it will be evident that these worm gears will rotate in opposite directions in a manner peculiarly adapted to be used for driving double beaters 24, 25 or" the type shown in Figs. l and 2. The beaters 24 and 25 are preferably so disposed that they intermesh with each other without contact, and consequently, they must be rotated in opposite directions at the same rate or speed and constantly maintained in the proper relative position to each other.

In the embodiment illustrated in Figs. l. to 6, the axis of the beaters24 and 25 extends in the same direction as the shaft of the motor 22 for the purpose of locating the beaters underneath the motor casing i0 and approximating a balanced motor structure. It is not necessary, however, to arrange the beaters 24, 25 parallel to the motor shaft in every embodiment of the invention as will be evident from Figs. 'I and 8, where the beaters extend in a direction at right angles to the shaft of the motor lli.

The gear casing 33 in the present embodiment may consist of a substantially cylindrical metal member, having an outward wall 39, which is adapted to fit around the outer edge of the plate 25 carried by motor casing l0, and the casing 33 is also provided with a relatively flat bottom wall 40 for rotatably supportlng'a pair of beater shafts `the beater shaft 4| comprises a metal member,

the upper end of which is threaded and adapted to be xedly secured to a bevel gear 46, having a complementary threaded bore. Below the threaded portion 41, the beater rod 4| is provided with a cylindrical journal 48, and the bearing 49 supports the bevel gear 46 in spaced relation tothe lowerwall 40 of gear casing 33. The cylindrical portion 48 of beater rod 4| may extend below the lower wall 40 of gear casing 33, the wall 40 being provided with an aperture 50 for receiving the bearing 49, and the beater shaft 4| may also support an outer washer against a shoulder 52.

The low ends of the beater rods 4| and 42 are preferably non-circular in form to engage in complementary sockets in the beaters 24 and 25, so that the beaters will be driven by the beater rods. It will thus be observed that when the bevel gear 46 is fixedly secured upon the beater rod 4I, the bearing 49 and washer 5| are confined between the shoulder 52 and the bevel gear 46, and the wall 46 is coniined between the annular flange 53 on bearing 49 and the washer 5|, so that the beater rods 4| andv 42 with their gears are rotatably mounted in the gear casing 33.

Where it is desired to have the beaters 24 and 25 located below the body of the motor, as in Figs. 1 to 6, the worm gears 30 and 3| may be provided with integral bevel gears 54 and 55 located to mesh with the bevel gears 46 carried by beater rods 4| and`42, but if itis desired to locate the beater shafts atright angles to the motor shaft, the bevel gears may be eliminated and the worm gears 30 and 3| carried directly by the beater shafts 4|`and 42, as illustrated in Figs. '2 and 8.

The beaters 24 and 25 may be identical in shape, and consequently, it is only necessary to describe one of these beaters in detail. The beaters 24 and 25 are each made removable from the lower ends of the beater rods 4| and 42, so

that the beaters may be separated from the motor and mechanism for cleaning, and the beaters may be washed without possibility of wetting the motor or other mechanism.

Each `of the beaters may consist of one or two sheet metal beating elements 56, 51, the preferred construction employing two such beating elements, as shown in Fig. 3. The beating element 56 consists of a strip of relatively ilat and thin sheet metal, having a substantially circular lower portion 58, which is provided with an aperture 59, forming a bearing for rotatably supporting the beater at its lower end.

The circular portion of beater element. is provided with a pair of upwardly extending legs 50 and 6| which may be provided at their upper ends with laterally turned attaching flanges 62 and 63. The other beating element 51 of the same beater is exactly the same in shape, but is disposed at right angles to the beating element 55 with its lower hole 64 in 'registry with the hole 59. Thesheet metal beating elements 56 and 51 are preferably secured together at their upper ends by providing a pair of washers 66 and 66, each having'substantially square apertures 61, and the washers 65, 56 are arranged on opposite sides of the laterally turned flanges 62, 53 on the beating elements.

The washers 55, 55 and end flanges 62, 63 may be secured in fixed relation to each other by providing an annular ferrule 66 having an inwardly extending annular flange 59 above thc upper` washer 55, and having an inwardly extending annular flange below the washer 66. One of the ange's 65, 16 is preferably formed after the parts are assembled, as shown in Fig. 3,

Iby crimping inward the edge of the-ferrule 88 4observed that each of the beaters 24 and 25 is thus provided with a non-circular socket 12 for receiving the lower end of the beater rods or shafts 4I, 42. If desired, the sockets 12 may be made of such size that the beater shafts 4i, 42 are frictionally gripped by the opposed resilient sides of the beater elements 58 and 51 adjacent socket 12, thereby eliminating any necessity for other types of devices for maintaining the beaters on the beater rods 4 I, 42, and additional means of support for the beaters on the beater rods may be provided by the sliding collar 12, which draws the legs 80, 8| into closer frictional engagement with beater rods 4|, 42.

The motor driven mixer is also preferably provided with some means for connecting together the lower ends of the beaters 24, 25, which may consist of a guard or frame 14 carried by the motor or gear casing. The guard 14 may be constructed of a rod or wire having a pair of upwardly extending legs 15, 18, and having a substantially circular lower portion 11, which extends out beyond the circular portions of the beater elements 5'6, 51.

The lower end,of guard 14 is provided with a transverse wire `frame member 18, which may be formed with a groove or socket 18 and spotwelded to the medial point of the guard 14 at its lower end. Each end of the transverse wire frame member 18 may be turned upward to form a bearing pin 88, adapted to be received in the holes 59, 84 in the beaters 24,' 25, and when the beaters are in assembled relation, as shown in Fig. 2, the guard 14 provides additional means for rotatably supporting the beaters 24, 25 at their lower ends.

In order to provide for the convenient removal of the beaters 24, 25, the guard 14 is removably mounted on the motor I0, and consequently, the lower wall 40 of the gear casing 38 may also support a pair of guard securing members 8|, 82. The guard securing member 8| comprises a metal stud, having an upper reduced threaded end 88, forming a shoulder 84, and the stud 8| may be secured to wall 48 by a nut 85, which confines the wall 40 between shoulder 84 and the nut. The lower end of stud 8| is provided with an axial bore 86, forming a tubular member capable of slidably receiving the, upper end of the leg 18fon guard 14.. The other guard securing member `82 may be secured to the gear casing 3l in a similar lmanner, and it is also preferably provided with an axial bore 88, but the lower half of the stud 82 is preferably cut away as at 81, leaving a substantially semi-cylindrical groove inthe member 8 2for receiving the wire 15 of guard 14.

The stud 82 may also be provided with a transverse aperture 88, and the extreme end of leg, 15 of guard 14 may be bent over at substantially right rangles to form a latching ydevice 88 for engaging in the aperture 88 and retaining the guard in the studs 8|, 82. The end 88 of wire leg 15 may also be threaded to receive nut 80, thereby permanenttly securing thevguard and motor in assembled relation where this is desirable.

The guard 14 being resilient, the legs'15 and 15 maybe grasped by the fingers and pressed together while the leg 18 is slid into the bore 88,

and the beaters 24, .25 having been assembled upon the journals 88. of the transverse wire 18, the complete assembly, which is shown in ex ploded position in Fig. 3, may-be slid upward until the hooked end 88 of leg 15 slides into the aperture 88 to retain the guard upon the motor I8. The resilience ofthe legs 15, 18 is sufllcieni to secure the guard ln the position of Fig. 1, but the nut 88 provides additional and more permanent securing means.

Referring to Figs. 7 and 8, the structure illustrated in these figures is a modified form in which the beater rods or shafts 4I, 42 are mounted in v the side of a gear casing 33 which has been modified accordingly. The beater shafts 4I and 42 of this embodiment may carry the worm gears 80, 8| in position to bedirectly engaged by the worm 28 on motor shaft 22, thereby eliminating the .bevel gears 48;y 54, 55.

It will be obvious that many different types of intermediate mechanical'connections may be provided, depending upon the exact direction in which it is desired to have the beaters extend with respect to the motor shaft, but the provision of the worm on the motor shaft and the worm gears engaged thereby on opposite sides of the worm eliminates any necessity for other gearing to drive the beaters in opposite directions.

It will thus be observed that I have invented an improved motor driven beater, which is peculiarly simple and4 light in its construction, and capable of being constructed by the addition of a drive mechanism and beaters to ordinary standard motors. l I

The device includes the gear casing flxedly secured to the motor with a pair or rotatable rods or shafts mounted in the gear casing and depending therefrom, gearing for operatively connecting rods with the motor shaft, and beater elements quickly detachably mounted on the lower ends of said rotatable rods.

WhileI have illustrated a preferred embodiment of my invention, many modifications may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of construction set forth, but de sire to avail myself of all changes within the" scope of the appended claims.

Having thus described my invention, what I claim is new and desire to secure byk Letters Patent of the United States, is:

l. In a motor driven beater, the combination of a motor having a casing and a motor shaft protruding from said motor casing, a separate gear casing carried by said motor casing, a pair of beater shafts journaled in said gear casing, operative mechanical connections in said gear casing for driving said beater shafts in opposite directions from said motor shaft, a pair of beaters actuated by said beater shafts, and removable famework for supporting said beaters on said gear casing carried by said motor casing, a pair of beater shafts journaled in said gear casing, operative mechanical connections in' said gear casing for driving said beater shafts in opposite directions fromsaid motor shaft, a tubular member carried 4by said gear casing, a grooved member carried by said gear casing, a pair of beaters op- 4 amazes f laidbeatersonsaidshafts. said gusrdcomprising a substantially U-shaped member having means for rotatably supporting the lower ends o! said beaters, a tubular member carried by said trame for siidably supporting one end o! said guard 5 and a grooved member having a socket for receiving the other end oi' said guard.

ALmT r. Do 

